class_docstr: Fix the backbones variable names for pretrained weight
code: def variant(self):
      return getattr(self.model, "variant", "")
  
file_path: PaddleHub/modules/image/object_detection/faster_rcnn_resnet50_fpn_venus/name_adapter.py
label_desc: Use image node_id 3 for calling the NameAdapter obj's underlying member method code with example usage: obj.variant() and returns: getattr